package com.example.coolweather.android;

import static com.example.coolweather.android.constants.Constants.PROVINCE_URL;

import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Toast;

import androidx.fragment.app.Fragment;

import com.example.coolweather.android.databinding.ChooseAreaBinding;
import com.example.coolweather.android.db.City;
import com.example.coolweather.android.db.County;
import com.example.coolweather.android.db.Province;
import com.example.coolweather.android.util.HttpUtil;
import com.example.coolweather.android.util.Utility;

import org.jetbrains.annotations.NotNull;
import org.litepal.LitePal;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

public class ChooseAreaFragment extends Fragment {

    ChooseAreaBinding binding;

    public static final int LEVEL_PROVINCE = 0;//省级
    public static final int LEVEL_CITY=1;//市级
    public static final int LEVEL_COUNTY = 2;//县级 ctrl+alt+L格式化代码
    private int currentLevel=LEVEL_PROVINCE;//当前显示的省级列表 currentLevel=0；

    List<Province> provinceList;//省的集合数据
    List<City> cityList;//市的集合数据
    List<County> countyList;//县的集合数据

    private Province selectedProvince;//选中的省份信息
    private City selectedCity;//选中的市份信息

    List<String> dataList = new ArrayList<>();//存放省份名称列表，市名称列表，县名称列表，与列表适配器 配合使用
    ProgressDialog progressDialog;//加载进度对话框

    ArrayAdapter<String> adapter;

    @Override
    public View onCreateView( LayoutInflater inflater,  ViewGroup container,  Bundle savedInstanceState) {
        binding=ChooseAreaBinding.inflate(inflater,container,false);
        //适配器的初始化
        adapter=new ArrayAdapter<>(getActivity(), android.R.layout.simple_list_item_1,dataList);
        //为列表组件设置适配器
        binding.listView.setAdapter(adapter);
        return binding.getRoot();
    }


    @Override
    public void onActivityCreated(Bundle savedInstanceState){
        super.onActivityCreated(savedInstanceState);

        //绑定列表项的点击事件
        binding.listView.setOnItemClickListener((adapterView, view, position, id) -> {//灯泡replace
            if (currentLevel==LEVEL_PROVINCE){
                selectedProvince=provinceList.get(position);//获取选中项（某个省份）
                queryCities();//查询城市
            }else if (currentLevel==LEVEL_CITY){
                selectedCity=cityList.get(position);
                queryCounties();
            }else if (currentLevel==LEVEL_COUNTY){
                //把当前位置还有weatherId传过去CNxxxxxxxx
                County county = countyList.get(position);
                String spot=String.format("%s|%s|%s",
                selectedProvince.getProvinceName(),
                        selectedCity.getCityName(),
                        county.getCountyName());//county的实现：ctrl+alt+v
                String location= county.getWeatherId().substring(2);
                Log.d("test", "onActivityCreated: "+spot+"|"+location);

                Intent intent=new Intent(getActivity(),WeatherActivity.class);
                intent.putExtra("spot",spot);
                intent.putExtra("location",location);
                startActivity(intent);
                getActivity().finish();//有去无回



            }
        });
        binding.backButton.setOnClickListener(v->{
            if (currentLevel==LEVEL_CITY){
                queryProvinces();
            }else if (currentLevel==LEVEL_COUNTY){
                queryCities();
            }
        });
        queryProvinces();

    }

    private void queryCities() {
        binding.titleText.setText(selectedProvince.getProvinceName());
        binding.backButton.setVisibility(View.VISIBLE);//有返回按钮
//访问数据表
        cityList = LitePal.where("provinceId=?",String.valueOf(selectedProvince.getId())).find(City.class);
        if (cityList.size()>0){
            dataList.clear();
            cityList.forEach(item->{
                dataList.add(item.getCityName());
            });
            adapter.notifyDataSetChanged();
            binding.listView.setSelection(0);
            currentLevel=LEVEL_CITY;
        }else {
            //数据库表是空表，发网络请求，获取数据，填充数据
            String url=PROVINCE_URL+"/"+selectedProvince.getProvinceCode();
            queryFromServer(url,"city");

        }

    }

    private void queryProvinces(){
        binding.titleText.setText("中国(China)");
        binding.backButton.setVisibility(View.GONE);//没有返回按钮

        provinceList = LitePal.findAll(Province.class);
        if (provinceList.size()>0){
            dataList.clear();
            provinceList.forEach(item->{
                dataList.add(item.getProvinceName());
            });
            adapter.notifyDataSetChanged();
            binding.listView.setSelection(0);
            currentLevel=LEVEL_PROVINCE;
        }else {
            queryFromServer(PROVINCE_URL,"province");

        }
    }

    private void queryCounties() {
        binding.titleText.setText(selectedProvince.getProvinceName()+":"+selectedCity.getCityName());
        binding.backButton.setVisibility(View.VISIBLE);//有返回按钮
//访问数据表
        countyList = LitePal.where("cityId=?",String.valueOf(selectedCity.getId()))
                .find(County.class);
        if (countyList.size()>0){
            dataList.clear();
            countyList.forEach(item->{
                dataList.add(item.getCountyName());
            });
            adapter.notifyDataSetChanged();
            binding.listView.setSelection(0);
            currentLevel=LEVEL_COUNTY;
        }else {

            //数据库表是空表，发网络请求，获取数据，填充数据
//            int provinceCode=selectedProvince.getProvinceCode();
//            int cityCode=selectedCity.getCityCode();
            String url=PROVINCE_URL+"/"+selectedProvince.getProvinceCode()+"/"+selectedCity.getCityCode();
            queryFromServer(url,"county");
        }

    }


    private void queryFromServer(String url, String type) {
        showProgressDialog();//开始加载进度条
        HttpUtil.sendOkHttpRequest(url, new Callback() {
            @Override
            public void onFailure(@NotNull Call call, @NotNull IOException e) {
               getActivity().runOnUiThread(()->{
                   Toast.makeText(getContext(),"访问网络失败！",Toast.LENGTH_SHORT).show();
                   closeProgressDialog();
               });

            }

            @Override
            public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {


                //解析数据 放在子线程中
                String strJson = response.body().string();//ctrl+alt+V
                Log.d("test", "onResponse: "+strJson);
                boolean result=false;
                if ("province".equals(type)){
                    result = Utility.handleProvinceResponse(strJson);//写入数据库
                } else if ("city".equals((type))) {
                    result = Utility.handleCityResponse(strJson,selectedProvince.getId());
                }else if ("county".equals((type))) {
                    result = Utility.handleCountyResponse(strJson,selectedCity.getId());
                }
                if (result){
                    if ("province".equals(type)){
                        getActivity().runOnUiThread(()->{
                            queryProvinces();
                        });
                    }else if("city".equals(type)){
                        getActivity().runOnUiThread(()->{
                            queryCities();
                        });
                    }else if("county".equals(type)) {
                        getActivity().runOnUiThread(() -> {
                            queryCounties();
                        });
                    }
                    closeProgressDialog();
                }else {
                    getActivity().runOnUiThread(()->{
                        Toast.makeText(getContext(),
                                "数据解析失败",Toast.LENGTH_SHORT).show();
                        closeProgressDialog();
                    });
                }
//x显示数据，再次调用queryProvinces（）方法
            }
        });
    }

    private void closeProgressDialog() {
        if (progressDialog!=null){
            progressDialog.dismiss();
        }
    }

    private void showProgressDialog() {
        if (progressDialog==null){
            progressDialog=new ProgressDialog(getContext());
            progressDialog.setMessage("正在访问网络，请稍后");
            progressDialog.setCancelable(false);
        }
        progressDialog.show();
    }
}
